v3.8.0.1
Discontinued Operations - Components of Results of Operations (Details) - USD ($)
$ in Thousands
12 Months Ended
Feb. 03, 2018
Jan. 28, 2017
Jan. 30, 2016
Operating expenses:      
Net income (loss) from discontinued operations $ 87,689 $ (53,670) $ (72,959)
Discontinued Operations, Disposed of by Sale      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Net revenue 94,137 115,437 123,332
Cost of goods sold 47,499 72,764 88,616
Gross Profit 46,638 42,673 34,716
Operating expenses:      
Research and development 34,530 88,538 99,603
Selling, general and administrative 6,925 6,415 6,442
Total operating expenses 41,455 94,953 106,045
Income (loss) from discontinued operations before income taxes 5,183 (52,280) (71,329)
Gain from sale of discontinued operations 88,406 0 0
Provision for income taxes 5,900 1,390 1,630
Net income (loss) from discontinued operations $ 87,689 $ (53,670) $ (72,959)